From mboxrd@z Thu Jan  1 00:00:00 1970
From: Roger Pau Monne <roger.pau@citrix.com>
Subject: Re: [PATCH v2] tools,
 configure: Fix LIB_PATH computation in configure scripts
Date: Wed, 4 Jul 2012 12:31:29 +0100
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To: Ian Campbell <Ian.Campbell@citrix.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>, "Keir
	(Xen.org)" <keir@xen.org>, Boris Ostrovsky <boris.ostrovsky@amd.com>, Ian Jackson <Ian.Jackson@eu.citrix.com>, "roger.pau@entel.upc.edu" <roger.pau@entel.upc.edu>, Matt Wilson <msw@amazon.com>
List-Id: xen-devel@lists.xenproject.org

Ian Campbell wrote:
> On Wed, 2012-07-04 at 12:26 +0100, Roger Pau Monne wrote:
>> Ian Campbell wrote:
>>> On Fri, 2012-06-08 at 21:23 +0100, Boris Ostrovsky wrote:
>>>> # HG changeset patch
>>>> # User Boris Ostrovsky<boris.ostrovsky@amd.com>
>>>> # Date 1339185838 -7200
>>>> # Node ID fa21f847fc66619fad38923cd87d6ba51d731eba
>>>> # Parent  32034d1914a607d7b6f1f060352b4cac973600f8
>>>> tools, configure: Fix LIB_PATH computation in configure scripts
>>>>
>>>> tool's configure script sets LIB_PATH by chopping off ${exec_prefix}
>>>> from $libdir and it does so by computing length of ${exec_prefix} value.
>>>> However, $libdir's value is a literal '${exec_prefix}/lib' string
>>>> (i.e. $exec_prefix is not substituted) and therefore LIB_PATH may be
>>>> computed incorrectly, most likely as "c_prefix}/lib64" assuming that
>>>> exec_prefix is NONE.
>>>>
>>>> Instead, we should start at offset `expr length '${exec_prefix}/'
>>>> (which is 15).
>>>>
>>>> Signed-off-by: Boris Ostrovsky<boris.ostrovsky@amd.com>
>>> Boris, sorry for letting this languish for so long.
>>>
>>> Roger, any opinion on this patch?
>>   >
>>> If I'm reading the script right this is the else clause of
>>>           [AS_IF([test "\${exec_prefix}/lib" = "$libdir"],
>>>
>>> so at this point we know libdir != ${exec_prefix}/lib, is there any
>>> guarantee that it even starts with \${exec_prefix} ?
>>>
>>> I think this patch is complementary too rather than conflicting with /
>>> subsumed by Matt's "tools: honour --libdir when it is passed
>>> to ./configure" ?
>> I think this patch is not needed anymore if we apply Matt's one, since
>> Matt's patch gets rid of LIB_PATH usage, and instead uses exec_prefix
>> and libdir directly.
>
> So Matt's patch could/should remove tools/m4/default_lib.m4?

Yes, I've already replied to that thread also :)